12.12 Mega Sale: Aquila $155, Aquila x2 $179, Proxima 6.0 $135, Aries $269. Exclusive Resin Bundles.

the size of model is wrong

1: Check the tightness of the synchronous belt. And adjust it into proper tightness.

2: Adjust the transmitting ratio. Turn up if it the size is smaller. Turn down if the size is bigger.

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